Roller-jewel protector



(No Model.)

A. N. GAUTHIER.

ROLLER JEWEL PROTECTOR. I

No. 535,693. Patented Mar. 12, 1895.

woawboz UNITED STATES PATENT OE IcE.

AGILE N. GAUTHIER, OF NElV ORLEANS, LOUISIANA.

ROLLER-J EWEL PROTECTOR.

SPECIFICATION forming part of Letters Patent No. 535,693, dated March 12, 1895.

Application filed October 26, 1894. Serial No. 527,042. (No model) To all whom it may concern.-

Be it known that I, AGILE N. GAUTHIER, of New Orleans, in the parish of Orleans and State of Louisiana, have invented certain new and useful Improvements in Roller-Jewel Protectors; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use it, reference being had to the accompanying drawings, which form part of this specification.

My invention relates to an improvement in roller jewel protectors; and it consists in the novel construction hereinafter described, of protecting the roller jewel from becoming injured when thrown from its position in the forked end of the lever.

The object of my invention is therefore to provide an attachment for arresting the shock to which the roller jewel is commonly subj ected.

Referring to the accompanying drawings Figure 1 is a side elevation of a balance shaft, wheel and roller, showing my improvement secured thereto. Fig. 2 is an inverted plan view with the roller jewel in proper engagement with the lever. Fig. 3 is a similar view, the jewel being out of engagement.

A designates the stalf, and B the balance wheel secured thereto.

D represents the roller secured to the stafi beneath the balance wheel and depending from near the outer edge thereof is the jewel E, upon opposite sides of which are the forks F, upon the outer end of escapement lever G. The ends of the forks are projected to form horns 11 while the opposite edges of the forked lever end are cut inward, as at I. Secured to and depending from the balance wheel B is the spring plate J which extends down through an enlarged opening D in roller D, so as to project downward about as far as jewel E.

lVhen the escapement is in working order the spring is not called into use, but if by a sudden jar of the watch the jewel should be thrown from between the forks F, the staff and balance Wheel would be revolved by the hair spring into the position shown in Fig. 3,

striking one of the horns H against spring J, thus deadening the shock and relieving the jewel E from a blow against the lever G, the former having sufficient room in the recess I toprevent the contact.

Thus it will be seen the jewel is most effectually protected, whereas were no means pro vided for arresting the movement of the staff the jewel would be thrown against the lever and probably broken.

Having thus described my invention, I claim- 1. The combination with a watch balance, an escapement jewel, and an escapement lever in engagement with the jewel, of a spring extending parallel with and adjacent the jewel for the purpose of engaging the lever when the latter is disengaged from the jewel, substantially as shown and described.

2. The combination of a watch balance, an escapementj ewel, an escapement lever forked at one end to form laterally extended horns, and a spring depending from the balance which the said horns are adapted to engage when the jewel is thrown from the lever fork, substantially as shown and described.

3. The combination of a staff, a balance wheel, a hair spring and a roller thereon, the latter being provided with a recess, a spring depending through said recess, a jewel de-' pending from the roller and adjacent said recess, and a forked lever in engagement with the jewel which is adapted to engage the spring when not in engagement with the jewel, substantially as shown and described.

4:. The combination of a watch balance, an escapement jewel, an escapement lever in engagement with the jewel, recesses in the respective edges of the lever, and a depending spring which the lever engages when thrown from its engagement with the jewel, substantially as shown and described.

In testimony whereof I affix my signature in presence of two witnesses.

A. N. GAUTHIER.

lVitnesses:

E. BoIssoU, LEON LOUISHOT. 

